Paradyne 3172 Operator's Manual

Also see for 3172: Quick installation Operator's guide Quick reference

Paradyne 3172 Operator's Manual Manual pdf 75 page image

Maintenance4-113170-A2-GB20-30 March 1999TroubleshootingThe E1 DSU/CSU is designed to provide you withmany years of trouble-free service. However, Table 4-6gives you some direction if a problem occurs. Forproblems other than those listed in the table, pleasecontact your service representative.Table 4-6(1 of 2)TroubleshootingSymptom Possible Cause SolutionsNo power 1. The power cord is not securely plugged intothe wall receptacle or rear panel connector.2. The wall receptacle has no power.1. Check that the power cord is securelyattached at both ends.2. Check the wall receptacle power by pluggingin some equipment that is known to beworking.Power-UpSelf-Test failsThe E1 DSU/CSU has detected an internalhardware failure.Contact your field service representative.Message LOS atNet appears1. Network cable problem.2. No signal is being transmitted at the far-endE1 DSU/CSU.3. E1 facility problem.4. The 120-ohm interface is being used and theRX SHIELD switch is in the EARTH position.1. Check that the network cable is securelyattached at both ends.2. Check the far-end E1 DSU/CSU status.3. Contact your E1 facility provider.4. Change the RX SHIELD switch to the OPENposition when using the 120-ohm interface.Message LOS atDTE appears1. DTE Drop/Insert cable problem.2. No signal being transmitted from the DTE.1. Check that the DTE Drop/Insert cable issecurely attached at both ends.2. Check the DTE status.Message OOF atNet appears1. Incompatible framing format between thenetwork and the E1 DSU/CSU.2. Network cabling problem.3. E1 facility problem.1. Check that the framing format for the networkinterface is correct.2. Check that the network cable is securelyattached at both ends.3. Contact your E1 facility provider.Message OOF atDTE appears1. Incompatible framing format between theDrop/Insert port on the customer premisesequipment and the E1 DSU/CSU.2. DTE Drop/Insert cabling problem.1. Check that the framing format for the DTEDrop/Insert interface is correct.2. Check that the DTE Drop/Insert cable issecurely attached at both ends.MessageRAI at Netappears1. Network cable problem.2. Far-end E1 DSU/CSU DTE has detected anLOS, LOF, AIS, or EER condition.3. E1 facility problem.1. Check that your network cable is securelyattached at both ends.2. Check the status of the far-end device.3. Contact your E1 facility provider.MessageRAI at DTEappearsDTE has detected an LOS, LOF, AIS, or EERcondition.1. Check the status of the DTE.2. Check that the DTE Drop/Insert cable issecurely attached at both ends.MessageAIS at Netappears1. Upstream E1 DSU/CSU is transmitting an AIS.2. The network is transmitting an AIS.1. Check the status of the upstream E1DSU/CSU(s).2. Contact your E1 facility provider.